Images are named as follows: N1_M1, where N1 is three (small image category) or two (large image category) digits equal to image number in category, and M1 is one of four different marks:

"F" - forged image,

"B" - binary mask (black and white mask),

"M" - mask (colored mask),

"O" - original image.

Additional information about transformations applied on forged images can be seen in "readme.txt" files.
Postprocessed images are named as follows: N1_M1_M2, where additional mark M2 points postprocessing methods applied on image: